BARRE — A temporary Green Mountain Coffee Roasters employee who threatened a mass shooting at the company’s Essex plant will face a felony charge of causing false public alarm Jan. 3 in Barre criminal court, said Waterbury village police.

Heightened security remained in effect Friday at the company’s Vermont locations, a corporate spokeswoman said.

The suspect, a 41-year-old Grand Isle County man, is accused of making the threat to a phone attendant at the company’s Waterbury call center Monday, causing the company to close an outlet store on Foundry Street and a coffee shop that doubles as a visitor center at the train station in Waterbury.

The company went into lockdown and requested a police presence at all 15 of its facilities in Waterbury due to the threat, police said.

Company spokeswoman Suzanne DuLong said security precautions involving law enforcement were still in effect Friday at all of the company’s locations in the state.

“We will evaluate the situation on an ongoing basis,” she said.

The employee, Alexander J. Garrison Jr., said he was upset he didn’t “get the job,” which police took to mean a full-time employment offer at the company, Waterbury Police Chief Joby Feccia said.

DuLong would not comment on Garrison’s job status.

Garrison previously made a bomb threat in Windsor County toward another local business where he worked, which resulted in a conviction, police said. That incident did not involve a bomb, police said.

According to Feccia, first-time offenses are misdemeanors. And as part of his conditions of release on the Windsor County incident, Garrison was prohibited from making any violent or threatening remarks.

Because Monday’s incident was allegedly Garrison’s second offense involving a public threat, the latest charge rises to the level of a felony, according to Feccia. Garrison is being held at the Northwest State Correctional Facility near St. Albans.

The Monday call was made as Garrison was going in to work at the company’s Essex manufacturing facility, but police found he was not carrying any weapons, Feccia said. A search of his residence turned up a semi-automatic rifle, an AR-15; a .22 long rifle; and a deer-hunting rifle, police said. The weapons were in the bedroom of the son of Garrison’s girlfriend, according to authorities.

Garrison denied making the threat against Green Mountain Coffee Roasters when confronted by police, Feccia said.

Thatcher Brook Primary School in Waterbury was also briefly in lockdown Tuesday morning. The school was not notified of the threat Monday, and school officials ordered the lockdown Tuesday as a precaution, Principal Don Schneider said. Village police told the school Tuesday that Garrison was in custody.

“If I thought for a second the school was in danger, I would have called them,” Feccia said.